136 lines
4.2 KiB
C
136 lines
4.2 KiB
C
/* $NetBSD: parse.c,v 1.3 2021/05/08 13:03:40 nia Exp $ */
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/*-
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* Copyright (c) 2021 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Nia Alarie.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/audioio.h>
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#include <sys/ioctl.h>
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#include <curses.h>
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#include <stdlib.h>
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#include "app.h"
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#include "parse.h"
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static struct aiomixer_class *get_class(struct aiomixer *, int);
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static int compare_control(const void *, const void *);
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static int compare_class(const void *, const void *);
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static struct aiomixer_class *
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get_class(struct aiomixer *aio, int class)
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{
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size_t i;
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for (i = 0; i < aio->numclasses; ++i) {
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if (aio->classes[i].index == class) {
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return &aio->classes[i];
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}
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}
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return NULL;
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}
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static int
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compare_control(const void *pa, const void *pb)
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{
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const struct aiomixer_control *a = (const struct aiomixer_control *)pa;
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const struct aiomixer_control *b = (const struct aiomixer_control *)pb;
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if (a->info.prev != AUDIO_MIXER_LAST ||
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b->info.prev != AUDIO_MIXER_LAST) {
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if (b->info.prev == a->info.index)
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return -1;
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if (a->info.prev == b->info.index)
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return 1;
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} else {
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return strcmp(a->info.label.name, b->info.label.name);
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}
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return 0;
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}
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static int
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compare_class(const void *pa, const void *pb)
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{
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const struct aiomixer_class *a = (const struct aiomixer_class *)pa;
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const struct aiomixer_class *b = (const struct aiomixer_class *)pb;
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if (strcmp(a->name, AudioCoutputs) == 0)
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return -1;
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if (strcmp(b->name, AudioCoutputs) == 0)
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return 1;
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return strcmp(a->name, b->name);
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}
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int
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aiomixer_parse(struct aiomixer *aio)
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{
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size_t i;
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struct mixer_devinfo info;
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struct aiomixer_class *class;
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struct aiomixer_control *control;
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for (info.index = 0;
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ioctl(aio->fd, AUDIO_MIXER_DEVINFO, &info) != -1; ++info.index) {
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if (info.type != AUDIO_MIXER_CLASS)
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continue;
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if (aio->numclasses >= __arraycount(aio->classes))
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break;
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class = &aio->classes[aio->numclasses++];
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memcpy(class->name, info.label.name, MAX_AUDIO_DEV_LEN);
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class->index = info.index;
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class->numcontrols = 0;
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}
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for (info.index = 0;
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ioctl(aio->fd, AUDIO_MIXER_DEVINFO, &info) != -1; ++info.index) {
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if (info.type == AUDIO_MIXER_CLASS)
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continue;
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if (info.type == AUDIO_MIXER_VALUE) {
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/* XXX workaround for hdaudio(4) bugs */
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if (info.un.v.delta > AUDIO_MAX_GAIN)
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continue;
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if (info.un.v.num_channels == 0)
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continue;
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}
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class = get_class(aio, info.mixer_class);
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if (class == NULL)
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break;
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if (class->numcontrols >= __arraycount(class->controls))
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break;
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control = &class->controls[class->numcontrols++];
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control->info = info;
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}
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qsort(aio->classes, aio->numclasses,
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sizeof(struct aiomixer_class),
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compare_class);
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for (i = 0; i < aio->numclasses; ++i) {
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class = &aio->classes[i];
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qsort(class->controls, class->numcontrols,
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sizeof(struct aiomixer_control),
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compare_control);
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}
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return 0;
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}
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